| Acronym | Definition |
|---|
| ESSS | Environment Services System Services |
| ESSS | Ethiopian Space Science Society |
| ESSS | External Stores Support System (US Army UH-60 helicopter) |
| ESSS | Environmental Science Seminar Series (American Meteorological Society) |
| ESSS | European School Science Symposium (competition) |
| ESSS | Electronic Sensors and Systems Sector (Northrop Grumman Corporation) |
| ESSS | Engineering Simulation and Scientific Software Ltda (Brazilian software company) |
| ESSS | European Spallation Source Scandinavia (Sweden) |
| ESSS | Enhanced Services Sales Support (Sprint) |
| ESSS | Early Steps to School Success (Save the Children) |
| ESSS | Ecclesiastical Sources for Slave Societies (project; Vanderbilt University) |
| ESSS | East Side Science Squad |
| ESSS | External Support Supply System |
| ESSS | Electronic Staff Summary Sheet |
| ESSS | Electronic Single Support Strategy |